Index: Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs
===================================================================
diff -u -r4819ca0dccbbe9e2ed5e5dc8f9dcdc3a328aa57e -r233f7dac7b44875cd668fb17835800a318db9ac3
--- Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs	(.../CalculationsView.cs)	(revision 4819ca0dccbbe9e2ed5e5dc8f9dcdc3a328aa57e)
+++ Riskeer/Common/src/Riskeer.Common.Forms/Views/CalculationsView.cs	(.../CalculationsView.cs)	(revision 233f7dac7b44875cd668fb17835800a318db9ac3)
@@ -126,6 +126,11 @@
         protected IAssessmentSection AssessmentSection { get; }
 
         /// <summary>
+        /// Gets the selected failure mechanism section.
+        /// </summary>
+        protected FailureMechanismSection SelectedFailureMechanismSection => listBox.SelectedItem as FailureMechanismSection;
+
+        /// <summary>
         /// Gets an indicator whether the view is loaded.
         /// </summary>
         protected bool Loaded { get; private set; }
@@ -243,15 +248,15 @@
             };
 
             // The concat is needed to observe the input of calculations in child groups.
-            inputObserver = new RecursiveObserver<CalculationGroup, TCalculationInput>(UpdateDataGridViewDataSource, pcg => pcg.Children.Concat<object>(pcg.Children.OfType<TCalculation>().Select(pc => pc.InputParameters)))
+            inputObserver = new RecursiveObserver<CalculationGroup, TCalculationInput>(() => UpdateDataGridViewDataSource(), pcg => pcg.Children.Concat<object>(pcg.Children.OfType<TCalculation>().Select(pc => pc.InputParameters)))
             {
                 Observable = calculationGroup
             };
             calculationObserver = new RecursiveObserver<CalculationGroup, TCalculation>(() => DataGridViewControl.RefreshDataGridView(), pcg => pcg.Children)
             {
                 Observable = calculationGroup
             };
-            calculationGroupObserver = new RecursiveObserver<CalculationGroup, CalculationGroup>(UpdateDataGridViewDataSource, pcg => pcg.Children)
+            calculationGroupObserver = new RecursiveObserver<CalculationGroup, CalculationGroup>(() => UpdateDataGridViewDataSource(), pcg => pcg.Children)
             {
                 Observable = calculationGroup
             };